C++ QTableView::resize方法代码示例

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

//! [0]
    TableModel *model = new TableModel(8, 4, &app);

    QTableView *table = new QTableView(0);
    table->setModel(model);

    QItemSelectionModel *selectionModel = table->selectionModel();
//! [0] //! [1]
    QModelIndex topLeft;
    QModelIndex bottomRight;

    topLeft = model->index(0, 0, QModelIndex());
    bottomRight = model->index(5, 2, QModelIndex());
//! [1]

//! [2]
    QItemSelection selection(topLeft, bottomRight);
    selectionModel->select(selection, QItemSelectionModel::Select);
//! [2]

//! [3]
    QItemSelection toggleSelection;

    topLeft = model->index(2, 1, QModelIndex());
    bottomRight = model->index(7, 3, QModelIndex());
    toggleSelection.select(topLeft, bottomRight);

    selectionModel->select(toggleSelection, QItemSelectionModel::Toggle);
//! [3]

//! [4]
    QItemSelection columnSelection;

    topLeft = model->index(0, 1, QModelIndex());
    bottomRight = model->index(0, 2, QModelIndex());

    columnSelection.select(topLeft, bottomRight);

    selectionModel->select(columnSelection,
        QItemSelectionModel::Select | QItemSelectionModel::Columns);

    QItemSelection rowSelection;

    topLeft = model->index(0, 0, QModelIndex());
    bottomRight = model->index(1, 0, QModelIndex());

    rowSelection.select(topLeft, bottomRight);

    selectionModel->select(rowSelection,
        QItemSelectionModel::Select | QItemSelectionModel::Rows);
//! [4]

    table->setWindowTitle("Selected items in a table model");
    table->show();
    table->resize(460, 280);
    return app.exec();
}

void PrintLayout::printTable()
{
	struct dive *dive;
	int done = 0; // percents done
	int i, row = 0, progress, total = estimateTotalDives();
	if (!total)
		return;

	// create and setup a table
	QTableView table;
	table.setAttribute(Qt::WA_DontShowOnScreen);
	table.setSelectionMode(QAbstractItemView::NoSelection);
	table.setFocusPolicy(Qt::NoFocus);
	table.horizontalHeader()->setVisible(false);
	table.verticalHeader()->setVisible(false);
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
	table.horizontalHeader()->setResizeMode(QHeaderView::Fixed);
	table.verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);
#else
	table.horizontalHeader()->setSectionResizeMode(QHeaderView::Fixed);
	table.verticalHeader()->setSectionResizeMode(QHeaderView::ResizeToContents);
#endif
	table.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	table.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	// fit table to one page initially
	table.resize(scaledPageW, scaledPageH);

	// don't show border
	table.setStyleSheet(
		"QTableView { border: none }");

	// create and fill a table model
	TablePrintModel model;
	addTablePrintHeadingRow(&model, row); // add one heading row
	row++;
	progress = 0;
	for_each_dive(i, dive) {
		if (!dive->selected && printOptions->print_selected)
			continue;
		addTablePrintDataRow(&model, row, dive);
		row++;
		progress++;
		emit signalProgress((progress * 10) / total);
	}
	done = 10;
	table.setModel(&model); // set model to table
	// resize columns to percentages from page width
	int accW = 0;
	int cols = model.columns;
	int tableW = table.width();
	for (i = 0; i < model.columns; i++) {
		int pw = qCeil((qreal)(tablePrintColumnWidths.at(i) * table.width()) / 100.0);
		accW += pw;
		if (i == cols - 1 && accW > tableW) /* adjust last column */
			pw -= accW - tableW;
		table.horizontalHeader()->resizeSection(i, pw);
	}
	// reset the model at this point
	model.callReset();

	// a list of vertical offsets where pages begin and some helpers
	QList<unsigned int> pageIndexes;
	pageIndexes.append(0);

	/* the algorithm bellow processes the table rows in multiple passes,
	 * compensating for loss of space due to moving rows on a new page instead
	 * of truncating them.
	 * there is a 'passes' array defining how much percents of the total
	 * progress each will take. given, the first and last stage of this function
	 * use 10% each, then the sum of passes[] here should be 80%.
	 * two should be enough! */
	const int passes[] = { 70, 10 };
	int tableHeight = 0, lastAccIndex = 0, rowH, accH, headings;
	bool isHeading = false;

	for (unsigned int pass = 0; pass < sizeof(passes) / sizeof(passes[0]); pass++) {
		progress = headings = accH = 0;
		total = model.rows - lastAccIndex;
		for (i = lastAccIndex; i < model.rows; i++) {
			rowH = table.rowHeight(i);
			accH += rowH;
			if (isHeading) {
				headings += rowH;
				isHeading = false;
			}
			if (accH > scaledPageH) {
				lastAccIndex = i;
				pageIndexes.append(pageIndexes.last() + (accH - rowH));
				addTablePrintHeadingRow(&model, i);
				isHeading = true;
				accH = 0;
				i--;
			}
			tableHeight += table.rowHeight(i);
			progress++;
			emit signalProgress(done + (progress * passes[pass]) / total);
		}
		done += passes[pass];
	}
	done = 90;
//.........这里部分代码省略.........

QWidget* WidgetStyle::createWidget(const QString& name)
{
    if(name == "CheckBox")
    {
        QCheckBox* box = new QCheckBox("CheckBox");
        box->setObjectName("CheckBox");
        return setLayoutWidget({ box }, { 100, 30 });
    }
    else if(name == "ComboBox")
    {
        QComboBox* box = new QComboBox;
        box->addItem("Item1");
        box->addItem("Item3");
        box->addItem("Item3");
        box->setObjectName("ComboBox");
        return setLayoutWidget({ box }, { 70, 30 });
    }
    else if(name == "DateEdit")
    {
        QDateEdit* date = new QDateEdit;
        date->setObjectName("DateEdit");
        return setLayoutWidget({ date }, { 110, 40 });
    }
    else if(name == "DateTimeEdit")
    {
        QDateTimeEdit* date = new QDateTimeEdit;
        date->setObjectName("DateTimeEdit");
        return setLayoutWidget({ date }, { 160, 30 });
    }
    else if(name == "Dialog")
    {
        QDialog* dialog = new QDialog;
        dialog->setObjectName("Dialog");
        return setLayoutWidget({ dialog }, { 160, 110 });
    }
    else if(name == "DockWidget") //?
    {
        QDockWidget* widget = new QDockWidget;
        widget->setObjectName("DockWidget");
        widget->resize(61, 22);
        return widget;
    }
    else if(name == "DoubleSpinBox")
    {
        QDoubleSpinBox* box = new QDoubleSpinBox;
        box->setObjectName("DoubleSpinBox");
        return setLayoutWidget({ box }, { 90, 40 });
    }
    else if(name == "Frame") //??
    {
        QFrame* frame = new QFrame;
        frame->setObjectName("Frame");
        frame->resize(150, 100);
        return frame;
    }
    else if(name == "GroupBox")
    {
        QGroupBox* box = new QGroupBox("GroupBox");
        box->setObjectName("GroupBox");
        return setLayoutWidget({ box }, { 160, 110 });
    }
    else if(name == "Label")
    {
        QLabel* label = new QLabel("Label");
        label->setObjectName("Label");
        return setLayoutWidget({ label }, { 40, 20});
    }
    else if(name == "LineEdit")
    {
        QLineEdit* line = new QLineEdit;
        line->setObjectName("LineEdit");
        return setLayoutWidget({ line }, { 30, 30 });
    }
    else if(name == "ListView") //??
    {
        QListView* view = new QListView;
        view->setObjectName("ListView");
        view->resize(71, 71);
        return view;
    }
    else if(name == "ListWidget")
    {
        QListWidget* list = new QListWidget;
        list->setObjectName("ListWidget");
        for(int i = 0; i < 20; i++)
            list->addItem(QString("Item %1").arg(i));
        return setLayoutWidget({ list }, { 80, 80 });
    }
    else if(name == "MainWindow")
    {
        QMainWindow* window = new QMainWindow;
        window->setObjectName("MainWindow");
        return setLayoutWidget({ window }, { 160, 110 });
    }
    else if(name == "Menu")
    {
        QMenu* parentMenu = new QMenu;
        parentMenu->setObjectName("Menu");
        parentMenu->addMenu("Menu1");
        QMenu* menu1 = parentMenu->addMenu("Menu2");
//.........这里部分代码省略.........

/* we create a table that has a fixed height, but can stretch to fit certain width */
QTableView *PrintLayout::createProfileTable(ProfilePrintModel *model, const int tableW)
{
	// setup a new table
	QTableView *table = new QTableView();
	QHeaderView *vHeader = table->verticalHeader();
	QHeaderView *hHeader = table->horizontalHeader();
	table->setAttribute(Qt::WA_DontShowOnScreen);
	table->setSelectionMode(QAbstractItemView::NoSelection);
	table->setFocusPolicy(Qt::NoFocus);
	table->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	table->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
	hHeader->setVisible(false);
	vHeader->setVisible(false);
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
	hHeader->setResizeMode(QHeaderView::Fixed);
	vHeader->setResizeMode(QHeaderView::Fixed);
#else
	hHeader->setSectionResizeMode(QHeaderView::Fixed);
	vHeader->setSectionResizeMode(QHeaderView::Fixed);
#endif
	// set the model
	table->setModel(model);

	/* setup cell span for the table using QTableView::setSpan().
	 * changes made here reflect on ProfilePrintModel::data(). */
	const int cols = model->columnCount();
	const int rows = model->rowCount();
	// info on top
	table->setSpan(0, 0, 1, 4);
	table->setSpan(1, 0, 1, 4);
	// gas used
	table->setSpan(2, 0, 1, 2);
	table->setSpan(3, 0, 1, 2);
	// notes
	table->setSpan(6, 0, 1, 5);
	table->setSpan(7, 0, 5, 5);

	/* resize row heights to the 'profilePrintRowHeights' indexes.
	 * profilePrintTableMaxH will then hold the table height. */
	int i;
	profilePrintTableMaxH = 0;
	for (i = 0; i < rows; i++) {
		int h = profilePrintRowHeights.at(i);
		profilePrintTableMaxH += h;
		vHeader->resizeSection(i, h);
	}
	// resize columns. columns widths are percentages from the table width.
	int accW = 0;
	for (i = 0; i < cols; i++) {
		int pw = qCeil((qreal)(profilePrintColumnWidths.at(i) * tableW) / 100.0);
		accW += pw;
		if (i == cols - 1 && accW > tableW) /* adjust last column */
			pw -= accW - tableW;
		hHeader->resizeSection(i, pw);
	}
	// resize
	table->resize(tableW, profilePrintTableMaxH);
	// hide the grid and set a stylesheet
	table->setItemDelegate(new ProfilePrintDelegate(this));
	table->setShowGrid(false);
	table->setStyleSheet(
		"QTableView { border: none }"
		"QTableView::item { border: 0px; padding-left: 2px; padding-right: 2px; }");
	// return
	return table;
}

void PrintLayout::printTable()
{
    // create and setup a table
    QTableView table;
    table.setAttribute(Qt::WA_DontShowOnScreen);
    table.setSelectionMode(QAbstractItemView::NoSelection);
    table.setFocusPolicy(Qt::NoFocus);
    table.horizontalHeader()->setVisible(false);
    table.horizontalHeader()->setResizeMode(QHeaderView::Fixed);
    table.verticalHeader()->setVisible(false);
    table.verticalHeader()->setResizeMode(QHeaderView::ResizeToContents);
    table.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    table.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    // fit table to one page initially
    table.resize(scaledPageW,  scaledPageH);

    // don't show border
    table.setStyleSheet(
        "QTableView { border: none }"
    );

    // create and fill a table model
    TablePrintModel model;
    struct dive *dive;
    int i, row = 0;
    addTablePrintHeadingRow(&model, row); // add one heading row
    row++;
    for_each_dive(i, dive) {
        if (!dive->selected && printOptions->print_selected)
            continue;
        addTablePrintDataRow(&model, row, dive);
        row++;
    }
    table.setModel(&model); // set model to table
    // resize columns to percentages from page width
    int accW = 0;
    int cols = model.columns;
    int tableW = table.width();
    for (int i = 0; i < model.columns; i++) {
        int pw = qCeil((qreal)(tablePrintColumnWidths.at(i) * table.width()) / 100.0);
        accW += pw;
        if (i == cols - 1 && accW > tableW) /* adjust last column */
            pw -= accW - tableW;
        table.horizontalHeader()->resizeSection(i, pw);
    }
    // reset the model at this point
    model.callReset();

    // a list of vertical offsets where pages begin and some helpers
    QList<unsigned int> pageIndexes;
    pageIndexes.append(0);
    int tableHeight = 0, rowH = 0, accH = 0;

    // process all rows
    for (int i = 0; i < model.rows; i++) {
        rowH = table.rowHeight(i);
        accH += rowH;
        if (accH > scaledPageH) { // push a new page index and add a heading
            pageIndexes.append(pageIndexes.last() + (accH - rowH));
            addTablePrintHeadingRow(&model, i);
            accH = 0;
            i--;
        }
        tableHeight += rowH;
    }
    pageIndexes.append(pageIndexes.last() + accH);
    // resize the whole widget so that it can be rendered
    table.resize(scaledPageW, tableHeight);

    // attach a painter and render pages by using pageIndexes
    QPainter painter(printer);
    painter.setRenderHint(QPainter::Antialiasing);
    painter.setRenderHint(QPainter::SmoothPixmapTransform);
    painter.scale(scaleX, scaleY);
    for (int i = 0; i < pageIndexes.size() - 1; i++) {
        if (i > 0)
            printer->newPage();
        QRegion region(0, pageIndexes.at(i) - 1,
                       table.width(),
                       pageIndexes.at(i + 1) - pageIndexes.at(i) + 1);
        table.render(&painter, QPoint(0, 0), region);
    }
}